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Active metamaterial polarization modulators for the Terahertz frequency range

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Article number012003
<mark>Journal publication date</mark>5/08/2020
<mark>Journal</mark>Journal of Physics: Conference Series
Issue number1
Volume1571
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English
Event2nd European Conference on Photonic, Optoelectronic and Electronic Materials, SPb-POEM 2020 - St. Petersburg, Russian Federation
Duration: 27/04/202030/04/2020

Conference

Conference2nd European Conference on Photonic, Optoelectronic and Electronic Materials, SPb-POEM 2020
CountryRussian Federation
CitySt. Petersburg
Period27/04/2030/04/20

Abstract

Active control of chirality in the terahertz frequency range is of great importance in many scientific areas, which include research into fundamental optical phenomena, investigation of novel materials, spectroscopy, imaging, wireless communications and chemistry. The lack of efficient, integrated and fast-reconfigurable polarization modulators has hindered, so far, the full exploitation of applications in all the aforementioned fields. Metamaterials are artificial resonant elements possessing unique remarkable properties such as high efficiency and miniaturization capability. The interplay of metallic metamaterial arrays with electrostatically tunable monolayer graphene has been demonstrated to be a valid approach for the realization of a novel class of THz devices. In this work, the realization of active chiral graphene/metamaterial modulator is presented. The versatility of this experimental approach allowed the device integration with broadband sources such as terahertz time domain spectrometers as well as with quantum cascade lasers. A continuous rotation of the polarization plane > 30° has been reported with a reconfiguration speed > 5 MHz. These results pave the way to the integration of fast terahertz polarization modulators in all the applications where these devices are in great demand.